I notice that if I set Data Validation I cannot stop a user from copying over
the cell from another cell outside the validation range and breaking the
validation of the cell copied over. Then on another note if the user copies
a cell from a different file it will accept the input but will keep the
original validation parameters with potentially incorrect data that does not
fit the original validation.

My first thought was to protect the worksheet and limit access to only
unprotected cells. But that is not even close to being a solution because
the user will have many unprotected cells they could copy from and / or could
open a different file and copy from it.

This is causing major problem. Is there a way to make the cell hold the
original validation and test the validation regardless of where the copy is
coming from?

Thank you for your help.

Steven